U.S. researchers created the first green seagoing glider to explore the undersea environment. This glider uses the temperature differences from the warm surface and the cold deeper layers to power itself, and by using this kind of power it managed to cross for more than 20 times the 13,000 feet deep Virgin Islands Basin between St. Thomas and St. Croix, since its launch in December. The Woods Hole Oceanographic Institute said that the robot is able to keep on going for another six months. This gliders can measure the biological productivity, temperature and salinity of the water. The robots need to get to surface to fix their positions and to communicate via Iridium satellite to a laboratory.

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